SSL ERROR

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Same thing i have this errors:

[29-Dec-2020 14:24:46 UTC] PHP Warning:  file_get_contents(): SSL operation failed with code 1. OpenSSL Error messages:
error:1416F086:SSL routines:tls_process_server_certificate:certificate verify failed in /---/---/public_html/wp-content/plugins/resmushit-image-optimizer/classes/resmushit.class.php on line 92

Error trying to compress:

An error occured when contacting webservice. Please try again later.