I find the following problem, caused by trying to upload a file that Omeka interpreted as unknown to LOGO first page.
From what I see, the blockade has been carried out for security reasons.
Currently, I can not access my site located at www.circuitos.
I enclose the error messages.
[25-Jan-2019 00:57:49 UTC] PHP Warning: shell_exec () has been disabled for security reasons in /home/umunter/circuitos.sdprionegro.com/application/libraries/Omeka/File/MimeType/Detect/Strategy /FileCommand.php on line 23
[25-Jan-2019 00:57:49 UTC] PHP Warning: Invalid argument supplied for foreach () in /home/umunter/circuitos.sdprionegro.com/application/libraries/Omeka/File/MimeType/Detect/Strategy/Browser .php on line 22