Update messed up

Hi,
I have updated Yoast yesterday and after few minutes (not immediately) after update site went into “maintenance mode” and that wouldnt end. So I googled up that I had to delete .maintenance file, then I deleted and installed Yoast again clean, then I re-installed WP, but still receiving this message in the admin panel (WP_DEBUG is set to false):

Warning: include( ...path... /.maintenance): failed to open stream: No such file or directory in / ...path... /wp-includes/load.php on line 181

Warning: include( ...path... /.maintenance): failed to open stream: No such file or directory in / ...path... /wp-includes/load.php on line 181

Warning: include(): Failed opening '/ ...path... /.maintenance' for inclusion (include_path='.:') in / ...path... /wp-includes/load.php on line 181

Warning: Cannot modify header information - headers already sent by (output started at / ...path... /wp-includes/load.php:181) in / ...path... /wp-admin/includes/misc.php on line 1114

What else do I need to do to fix that? Unfortunately I did not save the copy of .maintenance file (it had some number inside).