What to do if there is no e-mail set as a default

Guide to solving the problem that there is no email set as a default

The problem: The current mail client cannot fulfill the message forwarding request
The solution: The guide deals with the solution to the problem encountered when a file repeatedly pops up saying that there is no default e-mail client or that the current e-mail client cannot fulfill the message transfer request. The solution to the problem is possible with the help of Microsoft Office Outlook.

in the first level:  We need to open the Microsoft Office Outlook software and set it as our default client.

In the second level: We must go to the start menu and write in the search menu below the word "regedit" and navigate there.

In the third stage: After the "regedit" software has opened, we must select: HKEY_LOCAL_MACHINE\SOFTWARE\Clients\Mail\Microsoft Outlook and delete it (of course only after we have made a sure backup, by right-clicking the mouse and exporting).

In the fourth step: We must open Microsoft Office Outlook, access the Help menu and select the Office Diagnostics program or in English "Office Diagnostics".
Let it run until it detects and resolves all issues.

Successfully.