Your LimeSurvey version: 3.28.3
Own server or LimeSurvey hosting: our own server
Survey theme/template: Fruity (and our own template based on Fruity)
Hello everyone, I was using the ingenious solution of the questionSpreadsheetSurvey plugin on our LS (3.15.1) and we tried to instal it also on another LS (3.28.3). We followed the three steps described by the author at GitLab ( 1) Download dl.sondages.pro/questionSpreadsheetSurvey.zip 2) Extract: unzip questionSpreadsheetSurvey.zip 3) Move the directory to plugins/directory inside LimeSurvey - you can see in the attachment)  but the "Spreadsheet survey" button didn't show up in the Text question setting.
Is it because it's not compatible with LS 3.28 or are we doing something wrong? 
OS: Windows NT APP-EVOPJ-P01 6.2 build 9200 (Windows Server 2012 Datacenter Edition) i586
PHP version: 7.4.29
Server software: Apache/2.4.53 (Win32) OpenSSL/1.1.1n PHP/7.4.29
Database driver: mysqlnd 7.4.29
 

Maybe a silly question, but you never know:

Did you activate the plugin?

Now I just want to run away, burry myself six feet deep and hope that the world forgets about me. This much I'm ashamed. Yes, of course, it wasn't activated and yesterday we spent two hours investigating what might be wrong with the server. I feel like a clown.
Despite my idiocy, I'm immensely grateful for your silly question:)

Maybe a silly question, but you never know:

Hahahaha, Joffm, this is gold. I read the question, thought "Shall I ask if it is activated", but then I thought, no, better not ask this.

Lesson learned. Don't be scared to ask the silly questions. They might lead to the solution.

@external_eval: We've all been there at one point. It happens.