Hello,
I updated my site, but when I navigate, I meet

Not Found

The requested URL /m/photos/home/ was not found on this server.

Not Found

The requested URL /m/articles/index/ was not found on this server.

How can I solve the problem?

Thank you

Is the .htaccess file still present in the main directory?

yes the .htaccess file is present. I have to delete it?

because I've never deleted it

You may need to be more specific about what you have done as an update, have you made changes on the server?

 No, you don't delete it, it is needed for permalinks to work.

I went from 7.1.6 version 7.2
I have additional modules as well as changes to the code.
I did not encounter any errors during the update.

Some of those changes might have been undone by the upgrade.  Some modules have to be upgraded as well; and it is very important to follow the upgrades for the modules as listed by the developer of the module.  Also note that uninstalling a module removes the database table for that module meaning you can lose data.

I also had this problem, but sorry, I do not know how I solved it. For example, if you disable the Permalinks in advanced setings -> Permalinks for pictures module is that you will then access?

I made changes primarily to the template.
This should not prevent the operation of the links.
Baloo, it does not work

 If you PM me your site URL, maybe I can see something.

It is evident that the upgrade did not go well; the person doing the upgrade for you should not have left things half-arsed working, if nothing else, they should have put your site back the way it was.  A decent developer would not have left you with a broken site.  I am wondering if they did the upgrade on your live site.  7.2 upgrade should not be performed on a live site.  I am also wondering if they made backups of the files and database; if not, then you are stuck trying to fix your site while your members can not use it.

Having looked things over, there are missing main navigation drop-down items; not sure if these were removed on your old site or not.  It does appear that permalinks are not working; however, you stated that turning off permalinks did not allow you to navigate the site.

Note, it is not a template issue, I switched the site to use the UNI template with the same issues appearing.

Update, it is a permalink issue, turning off permalinks allows non hard coded menu links to work.

But you seem to copy and paste the error message 404, the above "/ m / articles / index /" is correct for your installation directory?

I turned off permalinks and the URLs work; so it could be he is missing the .htaccess file (although this was an upgrade of his existing site).

Ok, this is why I asked the question, so maybe replace the original .htaccess 7.2?

He will have to do that, I wasn't granted access to the server.

pm geek_girl ^^

Could it be that the problems come from this?
How can I solve it

<font color="red">short_open_tag is Off (must be On!)<b>Warning!</b> Dolphin cannot work without <b>short_open_tag</b>.</font> <br />
Please go to the <br />
<a href="http://www.boonex.com/trac/dolphin/wiki/GenDolTShooter">Dolphin Troubleshooter</a> <br />
and solve the problem.

 That certainly needs to be fixed.

Limited ftp access doesn't really allow me to help.  I did noticed that you don't have the standard .htaccess file that ships with Dolphin.  The extra entries in the .htaccess could be the problem.  Since you won't provide access to the site so someone can try and fix the problem this is the end of the story.

Sorry, being a beginner it's complicated for me.
I have modified the .htaccess file but it does not.

Correct, which is why you need to let those more experience help you.

This concern has been corrected.

The .htaccess file has been replaced by the 7.2 but it is still not working.

I sent a new PM to you.

Don't forget to check the /inc folder for the permissions if it was set at 555 the upgrade will fail or be incomplete.

This does not affect all servers.

My Folder / inc has the permissions to 755
Is this correct?