Drupal 8.x

I am trying to migrate from a drupal 7 site (all modules & core latest version) to a drupal 8 site and I keep getting the error

The d6_d7_acl_table plugin must define the source_module property (using the web migrate tool)

(drupal 8.7.0, php versions both 7.0.33 & 7.2 tried, 5.5.5-10.2.23-MariaDB, Memory limit 128M - my own cpanel server, so I have full access)

I have an error in my query:

Hi,

Does anyone have any ideas how to view the local Acquia Dev Desktop site on a mobile device - without uploading it to Acquia Cloud first?

I've spent a few hours investigating this issue. Acquia creates VirtualHost entries in the vhosts.conf file. When I modify the "Require local" entry to "Require all granted", then I can view the local site in a mobile device on my local network. This would "kinda" work, if you only had a single site, and you don't quit Acquia Dev Desktop.

I've added a drop down menu to the contact form which contains subject of the message. When the email is received from the form, all that is displayed in the subject fiend is [Contact Us]. Does anyone know how to get the custom field into subject line in messages?

Hi there,

got back to Drupal after years now and was really happy suprised, that Drupal really gots a rich and powerful system!
I'm loving it totally, also with having the SQLite option!! ;)

The new planned page will be done with Drupal8 and its stunning multi-language capabilities!!

BUT drupal.org ...

Hi,
Very recently I updated to Drupal 8.7.0 (from the previous release 8.6....), and switched the database system from PHP 5.6 to 7 on my provider via Cpanel for compatibility reasons (as Drupal required to do so). The database files are in their 5.6.41-84.1 version.

Now each time that I try to edit, duplicate or delete a view as well as when I go under Configuration/System/Basic Site Settings I got an "500 internal server error".  If try to add a view and it refuses to create it.

I can add content as usual, and as a visitor I can visit the website without any error.