Drupal 8.x

Hello,

I have a Drupal 8 site up and running, it has been working without any problems for a long time (a year or so). The owner called me to check it since somehow content edition stopped working. What I diagnosed is that if I edit a node and then click on save, I see in the browser that 403 Forbidden is returned and I remain in the editor page but my changes disappear and I see the last saved version.

After successfully installing Google analytics in drupal 8, I am trying to set Web Property ID, which seems to suggest the code starting with "U-" yet on the other hand Google Japan advises it is OK to use Web Property ID starting with "G-" which generated in their dashboard as Measurment ID https://analytics.google.com/.  When I entered that ID staring with "U" code in drupal, it returned the error :A valid Google Analytics Web Property ID is case sensitive and formatted like UA-xxxxxxx-yy.  Could someone please advise how I can

Successfully Installed tar file from, I believe,

https://www.drupal.org/project/bootstrap/releases/8.x-3.23

Yet,

but can't locate the one in the theme list in the Appearance page

Now so tried to install again the tar file then it says in red "Bootstrap Layouts is already installed."

So it seems Bootstrap Layouts is already installed.

Appreciate if you please advise what is wrong with this.

How to add tabs to switch between taxonomy/term/% and taxonomy/term/%/customurl

I a standard view "Taxonomy term" Page (/taxonomy/term/%)

I created a "Taxonomy term customurl" Page (/taxonomy/term/%/noimage) with CONTEXTUAL FILTERS -> Content: Has taxonomy term ID (with depth) [Depth 0 ; Provide default value->Taxonomy term ID from URL+Load default filter from term page] https://prnt.sc/121bw6l

(noimage is my custom url)

Now mysite.com/shopping (taxonomy/term/%) is working and 

My module needs to read and write files in the public:// and private:// folders. In the installation procedure I create the folders and files that do not exist, using the functions \Drupal::service('file_system')->prepareDirectory() and copy ().

When I run:

composer update 'drupal/core*' --with-dependencies

I get this warning:

Dependency "composer/installers" is also a root requirement. Package has not been listed as an update argument, so keeping locked at old version. Use --with-all-dependencies (-W) to include root dependencies.

So I do this (as suggested):

composer update 'drupal/core*' --with-all-dependencies

I then go no warning and  the following feedback;