Hi guys, I installed the MASTER template that was in joomla 3.4.5, installed regularly. After installation I updated to 3.7.5 and I encountered the following problems:

1) After the update, you receive the following message:

Caution
JInstaller:: Install: SQL Index Error column size too large. The maximum column size is 767 bytes.
File Update: Error SQL DB function failed file with error number 1709
Index column size too large. The maximum column size is 767 bytes.
SQL =
ALTER TABLE `#__ ucm_content` MODIFY` core_title` varchar (400) NOT NULL DEFAULT '';

2) In the Component menu that was presented see (img1) now it looks like (img2) pretty much everything has disappeared, banners, contacts, web links etc.

Can you help me?