Hello.
I set up the paypal, and filled in all account name, ID, secret. but nothing changed. please advise me how to proceed.
error log shows as below:
[Fri Apr 20 00:40:13.913751 2018] [:error] [pid 27641] [client 89.230.196.85:55589] script ‘/var/www/html/ojs/wp-login.php’ not found or unable to stat
[Fri Apr 20 00:46:28.471182 2018] [:error] [pid 31717] [client 14.17.3.65:34645] ojs2: 404 Not Found
[Fri Apr 20 00:48:50.299732 2018] [:error] [pid 32181] [client 101.226.68.215:23861] ojs2: 404 Not Found
[Fri Apr 20 00:49:04.750011 2018] [:error] [pid 31712] [client 36.149.129.108:31313] PHP Notice: Array to string conversion in /var/www/html/ojs/lib/pkp/classes/submission/Submission.inc.php on line 408, referer: http://tspsubmission.com/index.php/CMES/submissions
[Fri Apr 20 00:49:04.750058 2018] [:error] [pid 31712] [client 36.149.129.108:31313] PHP Notice: Undefined variable: subtitle in /var/www/html/ojs/lib/pkp/classes/submission/Submission.inc.php on line 495, referer: http://tspsubmission.com/index.php/CMES/submissions
[Fri Apr 20 00:49:07.128601 2018] [:error] [pid 27981] [client 36.149.129.108:31314] PHP Notice: Array to string conversion in /var/www/html/ojs/lib/pkp/classes/submission/Submission.inc.php on line 408, referer: http://tspsubmission.com/index.php/CMES/submissions
[Fri Apr 20 00:49:07.128649 2018] [:error] [pid 27981] [client 36.149.129.108:31314] PHP Notice: Undefined variable: subtitle in /var/www/html/ojs/lib/pkp/classes/submission/Submission.inc.php on line 495, referer: http://tspsubmission.com/index.php/CMES/submissions
[Fri Apr 20 00:49:09.650885 2018] [:error] [pid 31716] [client 36.149.129.108:31315] PHP Notice: Array to string conversion in /var/www/html/ojs/lib/pkp/classes/submission/Submission.inc.php on line 408, referer: http://tspsubmission.com/index.php/CMES/submissions
[Fri Apr 20 00:49:09.650932 2018] [:error] [pid 31716] [client 36.149.129.108:31315] PHP Notice: Undefined variable: subtitle in /var/www/html/ojs/lib/pkp/classes/submission/Submission.inc.php on line 495, referer: http://tspsubmission.com/index.php/CMES/submissions
[Fri Apr 20 00:51:32.053773 2018] [:error] [pid 27981] [client 14.17.3.64:36357] ojs2: 404 Not Found
[Fri Apr 20 00:57:00.548483 2018] [:error] [pid 27261] [client 183.57.53.177:52485] ojs2: 404 Not Found