Fehlermeldung im Contao Manager: Parse error on line 1: Deprecated: Not prov ^ Expected one of: 'STRING', 'NUMBER', 'NULL', 'TRUE', 'FALSE'

Fehlermeldung

app.CRITICAL: Uncaught PHP Exception Seld\JsonLint\ParsingException:
"Parse error on line 1: Deprecated: Not prov ^ Expected one of: 'STRING', 'NUMBER', 'NULL', 'TRUE', 'FALSE', '{', '['"
at phar:///www/htdocs/w0152ce6/develop/spektra-dresden.com/web/contao-manager.phar.php/vendor/seld/jsonlint/src/Seld/JsonLint/JsonParser.php line 339
{"exception":"[object] (Seld\\JsonLint\\ParsingException(code: 0): Parse error on line 1:\n
Deprecated: Not prov\n^\nExpected one of: 'STRING', 'NUMBER', 'NULL', 'TRUE', 'FALSE', '{', '['
at phar:///www/htdocs/w0152ce6/develop/spektra-dresden.com/web/contao-manager.phar.php/vendor/seld/jsonlint/src/Seld/JsonLint/JsonParser.php:339)"} []