BuddyPress.org

1. Which version of WordPress are you running?
5.7

2. Did you install WordPress as a directory or subdomain install?
installed on root

3. If a directory install, is it in root or in a subdirectory?

4. Did you upgrade from a previous version of WordPress? If so, from which version?
Fresh install

5. Was WordPress functioning properly before installing/upgrading BuddyPress (BP)? e.g. permalinks, creating a new post, commenting.
yes

6. Which version of BP are you running?
7.2.1

7. Did you upgraded from a previous version of BP? If so, from which version?
Fresh install

8. Do you have any plugins other than BuddyPress installed and activated? If so, which ones?
NO

9. Are you using the standard BuddyPress themes or customized themes?
Divi Theme

10. Have you modified the core files in any way?
Not yet

11. Do you have any custom functions in bp-custom.php?
Nope

12. If running bbPress, which version? Or did your BuddyPress install come with a copy of bbPress built-in?
no bbPress yet

13. Please provide a list of any errors in your server’s log files.

14. Which company provides your hosting? all-inkl.com (Germany)

15. Is your server running Windows, or if Linux; Apache, nginx or something else?
not sure

1. Which version of WordPress are you running?
⇒WordPress 5.6.1

2. Did you install WordPress as a directory or subdomain install?
⇒As a directory

3. If a directory install, is it in root or in a subdirectory?
⇒subdirectory? full pass /home/users/1/〇〇〇〇〇〇/web　

4. Did you upgrade from a previous version of WordPress? If so, from which version?
⇒Yes. WordPress　5.5.3　
But it is the first try to see wrong display in buddypress.
I am beginner.

5. Was WordPress functioning properly before installing/upgrading BuddyPress (BP)? e.g. permalinks, creating a new post, commenting.
⇒Yes properly.

6. Which version of BP are you running?
⇒Version 7.1.0

7. Did you upgraded from a previous version of BP? If so, from which version?
⇒Probably　No.

8. Do you have any plugins other than BuddyPress installed and activated? If so, which ones?
⇒bbpress Version　2.6.6
Other plugins are unactive in the test.

9. Are you using a standard WordPress theme or customized theme?
⇒a standard WordPress theme

10. Which theme do you use ?
⇒Generatepress Version 3.0.2

11. Have you modified the core files in any way?
⇒No

12. Do you have any custom functions in bp-custom.php?
⇒No

13. If running bbPress, which version? Or did your BuddyPress install come with a copy of bbPress built-in?
⇒bbpress Version　2.6.6
copy ⇒Unknown

14. Please provide a list of any errors in your server’s log files. https://codex.wordpress.org/Debugging_in_WordPress

⇒The code is adding.

 // WP_DEBUG debug mode
define( 'WP_DEBUG', true );

// /wp-content/debug.log 
define( 'WP_DEBUG_LOG', true );

⇒No error message!
⇒No log file generated. In short,　no bug?

15. Which company provides your hosting?
⇒lolipop.jp[Japan]

16. Is your server running Windows, or if Linux; Apache, nginx or something else?
⇒Linux（CentOS）
⇒　Apache

17. Which BP Theme are you using?
⇒Buddypress Nouveau

18. Have you overloaded any BuddyPress template files.
⇒Unknow

19. Any other site customisations that might have a bearing on the issue?
⇒No. 　After remove customisations code in bbpress, I checked it.

20. What BP Template Pack is activated in your installation? You will see that under Dashboard > Settings > BuddyPress – Options page.
⇒Buddypress Nouveau

Basic Trouble Shooting:

1. Identifying whether you have a theme issue:
⇒I tried other two themes[ Onepress and Twenty Twenty-One],
but the icon[×] trouble occurred in buddypress profile page.(Nothing happens)

2. Plugins:
⇒In the bbpress is activated only, the icon[×] works completely.(The topic deleted!!)
In the bbpress and buddypress set, the icon[×] trouble occurred in buddypress profile page.(Nothing happens)
Both test, the other plugins are invalid(not active).

3. BP Themes:
Both Buddypress Nouveau and Legacy, same wrong display.(Nothing happens)

I think it is something wrong with the icon[×] button? on forum section in buddypress.
Nothing happens when that [x] is clicked.

I dont see any bbPress plugin on our site though. Is it embedded in BuddyPress?