Help! Massive problems with the file grid field since update to 7.3.9

[bytebaby]

I can't maintain my client's website because of all the error messages after I upgraded EE from 7.3.6 to 7.3.9. (Note; I also have the addon "WYSIWYG" on version 5.4.4)

PHP: 7.4 (The errors also appear with PHP 8.1 and 8.2)
Apache

Please look the follow errors:

When I have saved a post:

On the homepage of the website when I'm logged in:

When I call the field in the field editor

Warning
array_merge(): Expected parameter 2 to be an array, null given
ee/legacy/libraries/api/Api_channel_fields.php, line 136

Severity: E_WARNING
Warning
array_merge(): Expected parameter 2 to be an array, null given
ee/legacy/libraries/api/Api_channel_fields.php, line 136

Severity: E_WARNING
Warning
array_merge(): Expected parameter 2 to be an array, null given
ee/legacy/libraries/api/Api_channel_fields.php, line 136

Severity: E_WARNING
Notice
Trying to access array offset on value of type null
ee/ExpressionEngine/Service/ConditionalFields/Factory.php, line 38

Severity: E_NOTICE
Notice
Trying to access array offset on value of type null
ee/ExpressionEngine/Service/ConditionalFields/Factory.php, line 38

Severity: E_NOTICE
Notice
Trying to access array offset on value of type null
ee/ExpressionEngine/Service/ConditionalFields/Factory.php, line 38

Severity: E_NOTICE
Notice
Trying to access array offset on value of type null
ee/ExpressionEngine/Service/ConditionalFields/Factory.php, line 38

Severity: E_NOTICE
Notice
Trying to access array offset on value of type null
ee/ExpressionEngine/Service/ConditionalFields/Factory.php, line 38

Severity: E_NOTICE
Notice
Trying to access array offset on value of type null
ee/ExpressionEngine/Service/ConditionalFields/Factory.php, line 38

Severity: E_NOTICE
Notice
Trying to access array offset on value of type null
ee/ExpressionEngine/Service/ConditionalFields/Factory.php, line 38

Severity: E_NOTICE
Notice
Trying to access array offset on value of type null
ee/ExpressionEngine/Service/ConditionalFields/Factory.php, line 38

Severity: E_NOTICE
Notice
Trying to access array offset on value of type null
ee/ExpressionEngine/Service/ConditionalFields/Factory.php, line 38

Severity: E_NOTICE
Notice
Trying to access array offset on value of type null
ee/ExpressionEngine/Service/ConditionalFields/Factory.php, line 38

Severity: E_NOTICE
Notice
Trying to access array offset on value of type null
ee/ExpressionEngine/Service/ConditionalFields/Factory.php, line 38

Severity: E_NOTICE
Notice
Trying to access array offset on value of type null
ee/ExpressionEngine/Service/ConditionalFields/Factory.php, line 38

Severity: E_NOTICE
Notice
Trying to access array offset on value of type null
ee/ExpressionEngine/Service/ConditionalFields/Factory.php, line 38

Severity: E_NOTICE
Notice
Trying to access array offset on value of type null
ee/ExpressionEngine/Service/ConditionalFields/Factory.php, line 38

Severity: E_NOTICE
Notice
Trying to access array offset on value of type null
ee/ExpressionEngine/Service/ConditionalFields/Factory.php, line 38

Severity: E_NOTICE
Notice
Trying to access array offset on value of type null
ee/ExpressionEngine/Service/ConditionalFields/Factory.php, line 38

Severity: E_NOTICE
Notice
Trying to access array offset on value of type null
ee/ExpressionEngine/Service/ConditionalFields/Factory.php, line 38

Severity: E_NOTICE
Notice
Trying to access array offset on value of type null
ee/ExpressionEngine/Service/ConditionalFields/Factory.php, line 38

Severity: E_NOTICE
Notice
Trying to access array offset on value of type null
ee/ExpressionEngine/Service/ConditionalFields/Factory.php, line 38

Severity: E_NOTICE
Notice
Trying to access array offset on value of type null
ee/ExpressionEngine/Service/ConditionalFields/Factory.php, line 38

Severity: E_NOTICE
Notice
Trying to access array offset on value of type null
ee/ExpressionEngine/Service/ConditionalFields/Factory.php, line 38

Severity: E_NOTICE
Notice
Trying to access array offset on value of type null
ee/ExpressionEngine/Service/ConditionalFields/Factory.php, line 38

Severity: E_NOTICE
Notice
Trying to access array offset on value of type null
ee/ExpressionEngine/Service/ConditionalFields/Factory.php, line 38

Severity: E_NOTICE
Notice
Trying to access array offset on value of type null
ee/ExpressionEngine/Service/ConditionalFields/Factory.php, line 38

Severity: E_NOTICE
Notice
Trying to access array offset on value of type null
ee/ExpressionEngine/Service/ConditionalFields/Factory.php, line 38

Severity: E_NOTICE
Notice
Trying to access array offset on value of type null
ee/ExpressionEngine/Service/ConditionalFields/Factory.php, line 38

Severity: E_NOTICE
Notice
Trying to access array offset on value of type null
ee/ExpressionEngine/Service/ConditionalFields/Factory.php, line 38

Severity: E_NOTICE
Notice
Trying to access array offset on value of type null
ee/ExpressionEngine/Service/ConditionalFields/Factory.php, line 38

Severity: E_NOTICE
Notice
Trying to access array offset on value of type null
ee/ExpressionEngine/Service/ConditionalFields/Factory.php, line 38

Severity: E_NOTICE
Notice
Trying to access array offset on value of type null
ee/ExpressionEngine/Service/ConditionalFields/Factory.php, line 38

Severity: E_NOTICE
Notice
Trying to access array offset on value of type null
ee/ExpressionEngine/Service/ConditionalFields/Factory.php, line 38

Severity: E_NOTICE
Notice
Trying to access array offset on value of type null
ee/ExpressionEngine/Service/ConditionalFields/Factory.php, line 38

Severity: E_NOTICE
Notice
Trying to access array offset on value of type null
ee/ExpressionEngine/Service/ConditionalFields/Factory.php, line 38

Severity: E_NOTICE
Notice
Trying to access array offset on value of type null
ee/ExpressionEngine/Service/ConditionalFields/Factory.php, line 38

Severity: E_NOTICE
Notice
Trying to access array offset on value of type null
ee/ExpressionEngine/Service/ConditionalFields/Factory.php, line 38

Severity: E_NOTICE
Notice
Trying to access array offset on value of type null
ee/ExpressionEngine/Service/ConditionalFields/Factory.php, line 38

Severity: E_NOTICE
Notice
Trying to access array offset on value of type null
ee/ExpressionEngine/Service/ConditionalFields/Factory.php, line 38

Severity: E_NOTICE
Notice
Trying to access array offset on value of type null
ee/ExpressionEngine/Service/ConditionalFields/Factory.php, line 38

Severity: E_NOTICE
Notice
Trying to access array offset on value of type null
ee/ExpressionEngine/Service/ConditionalFields/Factory.php, line 38

Severity: E_NOTICE
Notice
Trying to access array offset on value of type null
ee/ExpressionEngine/Service/ConditionalFields/Factory.php, line 38

Severity: E_NOTICE
Notice
Trying to access array offset on value of type null
ee/ExpressionEngine/Service/ConditionalFields/Factory.php, line 38

Severity: E_NOTICE
Notice
Trying to access array offset on value of type null
ee/ExpressionEngine/Service/ConditionalFields/Factory.php, line 38

Severity: E_NOTICE
Notice
Trying to access array offset on value of type null
ee/ExpressionEngine/Service/ConditionalFields/Factory.php, line 38

Severity: E_NOTICE
Notice
Trying to access array offset on value of type null
ee/ExpressionEngine/Service/ConditionalFields/Factory.php, line 38

Severity: E_NOTICE
Notice
Trying to access array offset on value of type null
ee/ExpressionEngine/Service/ConditionalFields/Factory.php, line 38

Severity: E_NOTICE
Notice
Trying to access array offset on value of type null
ee/ExpressionEngine/Service/ConditionalFields/Factory.php, line 38

Severity: E_NOTICE
Notice
Trying to access array offset on value of type null
ee/ExpressionEngine/Service/ConditionalFields/Factory.php, line 38

Severity: E_NOTICE
Notice
Trying to access array offset on value of type null
ee/ExpressionEngine/Service/ConditionalFields/Factory.php, line 38

Severity: E_NOTICE
Warning
Cannot modify header information - headers already sent by (output started at ee/legacy/core/Exceptions.php:120)
ee/ExpressionEngine/Boot/boot.common.php, line 480

Severity: E_WARNING

ADDENDUM: I can no longer edit fields

[intoeetive]

@bytebaby can you check if this fix would solve your issue? #3688

[bytebaby]

I have downgraded the system to 7.3.6 but the grid field error remains.

[intoeetive]

@bytebaby can you try applying the fix? (whether on downgraded or latest version)

[bytebaby]

Thanks for the quick reply. The micro update works. I am happy! :)