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Error starting solr: Error while waiting for a response from the agent: javax.ws.rs.InternalServerErrorException: HTTP 500 Server Error

By Linda Ng, at 2022-05-16

Solved: Error starting solr: Error while waiting for a response from the agent: javax.ws.rs.InternalServerErrorException: HTTP 500 Server Error......

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SOLVED: uses-sdk:minSdkVersion 16 cannot be smaller than version 21 declared in library

SOLVED: Invalid command 'ProxyPreserveHost', perhaps misspelled or defined by a module not included in the server configuration

SOLVED: PHP Warning: date(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected the timezone 'UTC' for now, but please set date.timezone to select your timezone.

SOLVED: PHP Fatal error: Uncaught Error: Call to undefined function curl_init() in /var/www/

SOLVED: Invalid command 'RewriteEngine', perhaps misspelled or defined by a module not included in the server configuration

SOLVED: Invalid command 'SSLCertificateFile', perhaps misspelled or defined by a module not included in the server