[Gelöst] WPML crashes during multisite configuration

When configuring WPML in a multisite website, the website crashed in the last step and has been offline since then. In order to reactivate the many web pages of the multisite, I would like to know what I have to delete via FTP so that the website can be loaded again. Currently, I only have FTP access to the website.

The browser gives the following error message:

Gateway Timeout
The gateway did not receive a timely response from the upstream server or application.

The provider's web error log has returned this error message:
2023-07-07 17:32:20 2001:818:dcd2:6700:5492:bf71:570c:f869 proxy_fcgi:error 9585 (70007)The timeout specified has expired: AH01075: Error dispatching request to : (polling)
2023-07-07 17:29:52 185.196.220.26 core:error 11149 AH00124: Request exceeded the limit of 10 internal redirects due to probable configuration error. Use 'LimitInternalRecursion' to increase the limit if necessary. Use 'LogLevel debug' to get a backtrace.
2023-07-07 17:29:52 185.196.220.26 core:error 11149 AH00124: Request exceeded the limit of 10 internal redirects due to probable configuration error. Use 'LimitInternalRecursion' to increase the limit if necessary. Use 'LogLevel debug' to get a backtrace.

The PHP log has these error messages:

2023-07-07 17:29:03 PHP Warning Constant WP_DEBUG already defined in /home/sites/site100019687/web/www.academicwebs.com/wp-config.php on line 95
2023-07-07 17:29:03 PHP Warning Constant WP_AUTO_UPDATE_CORE already defined in /home/sites/site100019687/web/www.academicwebs.com/wp-config.php on line 97

I would be very thankful, if you could help me fast with a solution, to re-activate the Multisite.

Best,

Jens