Several errors after clean install

Hello,

I’ve just purchased Arcane theme, and it has several errors in a clean install of WordPress. This is the configuration details:

– WordPress 4.9.8 (same errors in WP 5.x)
– PHP 7.1 (tried also with 7.0 and 7.2)
– Followed install instructions:
* Changed URL structure in permalinks to “Post name”
* Uploaded theme through WP upload page
* Fine-tuned php.ini to:

    upload_max_filesize = 100M
    post_max_size = 100M
    memory_limit = 1024M
    max_execution_time = 3000

* Installed and activated all plugins mandatory and recommended.

After importing demo data, the following errors are reported:

Failed to import pa_color Black
Failed to import pa_color Blue
Failed to import pa_color Green
Match “COD WEEKEND FINAL - Round 1” already exists.
Match “COD WEEKEND FINAL - Round 2” already exists.
Match “COD WEEKEND FINAL - Round 3” already exists.
Match “COD WEEKEND FINAL - Round 4” already exists.
Match “COD WEEKEND FINAL - Round 5” already exists.
Match “WGLNA Fall Season 2018 Gold League - Round 1” already exists.
Match “WGLNA Fall Season 2018 Gold League - Round 2” already exists.
Match “WGLNA Fall Season 2018 Gold League - Round 3” already exists.
Match “WGLNA Fall Season 2018 Gold League - Round 4” already exists.
Match “WGLNA Fall Season 2018 Gold League - Round 5” already exists.
Match “ELECTRONIC SPORTS WORLD CUP 2018 - Round 1” already exists.
Match “ELECTRONIC SPORTS WORLD CUP 2018 - Round 1” already exists.
Match “ELECTRONIC SPORTS WORLD CUP 2018 - Round 2” already exists.
Match “Winter games: Finals - Round 2” already exists.
Match “Winter games: Finals - Round 2” already exists.
Failed to import Entrada “”
Failed to import pa_color Black
Failed to import pa_color Green
Failed to import pa_color Black
Failed to import pa_color Blue

All done. Have fun!

Also when browsing to the site, it is buggy in multiple places:

– There is “Sign in” button but no register button (in the demo there is a register button). This is the worst issue for me.
– Under menu there is one row with [layerslider id=”1″] text.
– Entries in Contact, Gaming News and a couple of Team Wars menu are not working.

See image attached.

Thanks in advance.