Good morning!
I recently updated from version 4.5.1+210923 to version 5.1.13+210923.

Today I received a "Response Submission Email" for one of my surveys but there were no links to the responses/statistics and the survey answers were not included.
This is what I received:
*************
Hello,

A new response was submitted for your survey 'Technology Response Survey 2021-2022'.

Click the following link to reload the survey:
RELOADURL

Click the following link to see the individual response:
VIEWRESPONSEURL

Click the following link to edit the individual response:
EDITRESPONSEURL

View statistics by clicking here:
STATISTICSURL

The following answers were given by the participant:
ANSWERTABLE
*************
What do I need to do/edit to fix this?

Just checked with a sample survey with 5.1.14 version : i have the links.
Maybe you have a plugin or something like this ?
 

Check the email template to ensure that those placeholders are wrapped in curly braces.

Thank you for your responses.

I just checked my "email template" and it looks just like the example you posted.  Funny thing is that the survey name does come through on the email.  The rest of the fields just show the placeholder name in the email.

**********
Hello,

A new response was submitted for your survey '{SURVEYNAME}'.

Click the following link to reload the survey:
{RELOADURL}

Click the following link to see the individual response:
{VIEWRESPONSEURL}

Click the following link to edit the individual response:
{EDITRESPONSEURL}

View statistics by clicking here:
{STATISTICSURL}
**********

email send as text maybe ?

I'm assuming that this might be related.

As DenisChenu suggested, I thought I would check my plugins.  When I click the Plugins link... I do not get the plugins page.  I instead receive a 500:Internal Server Error message.  Any ideas on what to do here?500: Internal Server ErrorMissing configuration file for plugin AuditLog, looked in location /var/www/html/limesurvey/plugins/AuditLog/config.xmlAn internal error occurred while the Web server was processing your request.Please contact Administrator to report this problem.

When I look for that file it is not there.  I do not have "AuditLog" in that location.  On my server it is located at /limesurvey/application/core/plugins/AuditLog.
Any ideas?

To resolve the 500 error trying to access the plugins section I ended up copying all the plugins from the location they had been on the 4.5.1 version and then pasting them into the location that the 5.1.13 version was looking for them.  I had to keep a copy in the old location... so it had to be in both places to work.  I can now access the Plugins page.  The only problem is that ALL the plugins are in there twice now.  A few of the duplicates have one of them that is Enabled and the duplicate is Disabled.

I've not changed anything in that regard. The only change was to upgrade the LimeSurvey version. It was working perfectly up until that time.

The placeholder for the title of the survey is working correctly. The others are not.

AuditLog was activated ?

For the 500 error : please report the issue to have a good way to fix it.

Yes.  AuditLog was enabled.  While waiting to hear back, I loaded a clean install of 5.1.13 and then tried with a clean install of 5.1.14+210927 on my "testing" server.  On my "testing" server AuditLog is not enabled.  I then exported the survey from my production environment and imported in this instance.  I get the same results.  No links and no answers at the bottom.  Just the placeholders.

Okay.  Since things were not improving, as a test I put version 4.5.1+210420 back on my test server.  The links are back.  I'm not sure what the difference is between those versions but at least on my server the upgrade breaks the placeholder retrieval of links and data.