Xenforo Installation fail E_Warning - ErrorException

[saforge]

I had Xenforo installed multiple times during the last years and it worked every time without any problems. But not this time:
After uploading the files, insert MySQL Data and start the installation it stops in the middle with this error. I tried it with the latest version 2.2.13 and the previous version, also uploaded the files again and so on - every time the same issue.

I'm not sure, if somethings is really missing or it's an PHP error? (and the appmusic file is there)
PHP version...

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Xenforo Installation fail E_Warning - ErrorException

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