Interface/Apps problems

Created by: ilu33

I lost track of this project due to being otherwise occupied and when - after doing nothing for a couple of month - I updated our server to the newest dev version I realized that our redbasic-derived theme was incompatible. So I switched back to redbasic but still all navigation icons are gone. Also newly added wiki pages don't show up. Everything works as long as I know the exact url but no way to reach anything except settings and connections via menu. There are dozens of errors but I can't say whether anything is related. Here are some of the recent ones:

PHP Fatal error:  Class 'Zotlabs\Lib\App' not found in .../Zotlabs/Lib/DB_Upgrade.php on line 86

2017-04-26 23:07:00
alter table channel add channel_password varchar(255) not null ;
SQLSTATE[23502]: Not null violation: 7 ERROR:  column "channel_password" contains null values
2017-04-26 23:07:00
alter table channel add channel_salt varchar(255) not null ;
SQLSTATE[23502]: Not null violation: 7 ERROR:  column "channel_salt" contains null values
2017-04-26 23:50:01
select * from item where resource_type = 'nwikipage' and resource_id = '598865c4c745a294a57b3c3b18733dcb5eb78f70e126e2781906b8192bf1720f' and uid = 4 and item_deleted = 0
			 group by mid order by created asc;
SQLSTATE[42803]: Grouping error: 7 ERROR:  column "item.id" must appear in the GROUP BY clause or be used in an aggregate function
LINE 1: select * from item where resource_type = 'nwikipage' and res...
               ^
2017-04-26 23:50:55
SELECT * from item WHERE uid = 4 AND ( id = 10710 OR ( resource_type = 'nwiki' and resource_id = 598865 )) ;
SQLSTATE[42883]: Undefined function: 7 ERROR:  operator does not exist: text = integer
LINE 1: ...0710 OR ( resource_type = 'nwiki' and resource_id = 598865 )...
                                                             ^
HINT:  No operator matches the given name and argument type(s). You might need to add explicit type casts.