[BUG] Not possible to install Master Apps | Json parse Error on a fresh install

[nixmomo]

Describe the bug
As described here #1324
i get always a json Error if i open the page to install master apps

To Reproduce
Steps to reproduce the behavior:

1. fresh install of web ui with installer
2. fresh install of gameserver with installer (i tried on a different server and on the same server as the webinterface, both results in this error)
3. Add the gameserver in the webui
4. Open the master app page and see the error

Expected behavior
possibility to install master apps

Screenshots
https://user-images.githubusercontent.com/8502506/160114298-ffdc9164-50df-46de-a57c-955d3df45665.png

Desktop (please complete the following information):

• OS: Debian 10
• Browser all Browsers
• Version current stable from installer (6.2.)

[nixmomo]

No Ideas?? I tried on 9 different machines and all getting the same issue

[AEon-Jan]

Install the Latest DEV version Manually.
This seems to be a PHP 8 Issue this SHOULD be resolved in the latest version.

If you need help hit me up on Discord
Jan#9049

[AEon-Jan]

No reply - So it is considered solved