TYPO3 Exception 1507645381

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RuntimeException: Object Name String, contains invalid character

#1507645381 RuntimeException
Line 0: Object Name String, ".." contains invalid character "...".
Must be alphanumeric or one of: "_:-\."

Cause of error: BOM in ext_conf_template.txt

This exception got thrown in TYPO3 9.5.5, when the ext_conf_template.txt file contained a BOM (byte order mark) character at beginning of the file and the Extension Configuration was fetched using the ExtensionConfiguration API.

Fix error

Fix, see these resources: