Upgrading Drupal

After Updating from 7.44 to 7.50 Getting this on Status Page. 4 byte UTF-8 for mysql is disabled.
From what i read , this is mainly for allowing for emojis, Asian symbols, mathematical symbols, etc.
If my sites (71 of them ). Do Not use them, Does leaving this like it is pose any problems and/or security risks.
Current use is Database system version 5.6.29
Thanks ahead of time.
abe

Some problem: http://www.drupalcenter.de/node/55432

After replace core to new version from 8.1.3 to 8.1.5 have error:
PHP Fatal error: require(): Failed opening required '.../core/modules/user/src/UserServiceProvider.php' (include_path='.:/usr/local/zend-5.6/share/pear') in .../vendor/symfony/class-loader/ApcClassLoader.php on line 110

Hello team,

I had an issue when updated to version 7.50. System require infinite_scroll module but as I knew there are gd_infinite_scroll and views_infinite_scroll so, what kind is this module ???

Here is warning:

User warning: The following module is missing from the file system: infinite_scroll. In order to fix this, put the module back in its original location. For more information, see the documentation page. in _drupal_trigger_error_with_delayed_logging() (line 1128 of /var/customers/webs/zazxxxlh/manage.vn/includes/bootstrap.inc).

Greetings,

I have two Drupal 8.1.3 websites. One of them is using two third-party modules (Node View Permissions 8.x-1.0 and Video 8.x-1.2). I tried to upgrade that site first and extracted the contents of the .tar.gz overwriting all files to the site's documentroot... then I browsed to /update.php and got the general your site is broken error. Looking in my logs I see:

If a known issue listed on 7.43 is not listed on 7.44, does that mean the issue is resolved or not?

Dear all,