Clear that error log file and try reuploading (after having deleted them) the
I can't find an option in MyAdmin to clear the error log myself. But it was cleared today anyway. Maybe it happens automatically each day?
Called bySyntaxError: JSON.parse: unexpected character at line 1 column 1 of the JSON data
Call to undefined function phpbb\install\helper\iohandler\json_encode() in /home/XXXXXXXX/domains/XXXXXXX.nl/public_html/phpbb/install/helper/iohandler/ajax_iohandler.php