Error site MODX does not open. The error code in the task description.

Colleagues, the error occurred in MODX and the site does not start. Admin goes. Rolled back to the old version and the same error. Please help anyone who understands MODX. Work through a secure deal.

Sep 25 04:44:15 vh262 apache_error[5681]: XXXX.com [Sat Sep 25 04:44:15 2021] [error] [pid 24390] sapi_apache2.c(325): [client 91.122.150.218:54052] PHP Fatal error: Uncaught exception Exception with message String could not be parsed as XML in /home/u/XXXXXXXpublic_html/core/cache/includes/elements/modsnippet/18.include.cache.php:25 Stack trace: #0 /home/u/XXXXpublic_html/core/cache/includes/elements/modsnippet/18.include.cache.php(25): SimpleXMLElement->__construct() #1 /home/u/XXXX/public_html/core/model/modx/modscript.class.php(70): include(/home/u/ungertm...) #2 /home/u/XXX/public_html/core/model/modx/modparser.class.php(536): modScript->process(&defTown=`1` &d...) #3 /home/uXXX/public_html/core/components/pdotools/model/pdotools/pdoparser.class.php(248): modParser->processTag(Array, true) #4 /home/u/XXX/public_html/core/model/modx/modparser.class.php(250): pdoParser->processTag(
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