Kaltura downloads not more than 1 minute video

[p3t30r]

Checklist

• I'm reporting a broken site support issue
• I've verified that I'm running youtube-dl version 2020.01.01
• I've checked that all provided URLs are alive and playable in a browser
• I've checked that all URLs and arguments with special characters are properly quoted or escaped
• I've searched the bugtracker for similar bug reports including closed ones
• I've read bugs section in FAQ

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while downloading videos from safari online lesson it just downlods fists part of video which is only 1 minute long. It does't continue download to other hls part of video . I think the reason the json file which contains video part info of video isnt readable or unaccesable. The Error is:" WARNING: [safari] 9781789131550-video1_1: Failed to parse JSON No JSON object could be decoded"