Sometimes using too many Gmail accounts may create a problem with your account, and there are high chances that you face Gmail error code 400. This error can sometimes be very irritating, so you must fix it as early as possible.
Fix the bad request error 400 for the Gmail account
The main reason behind this error is the gmail_imp.So. So to get rid of this error, you must remove it from the cookies stored. To make it more clear let’s see how you can fix it.
1. Go to your chrome browser, and then right-click on your screen
2. Once you right-click on the screen, you will get to see many options on the screen
3. You have to click on the Inspect Element option
4. Now go to the option resources on the top of your window
5. Click on the tab cookies, which is available on the left of your screen
6. Clicking on the cookies, you have to expand it
7. Go to the mail.google.com cookies and right-click on gmail_imp.
8. Now go for the delete option for the list
9. Once the cookies are deleted, close the window
You can also go to the advanced setting to clear all available cookies
Go to the setting page on your chrome
Locate the slowly advanced settings
On the privacy section, choose the content settings
On cookies section, open all the available cookies file and delete the cookies file
So, following the steps above, you can fix the Gmail error code 400. In case you still need any further assistance, you can speak to the customer support team of Gmail anytime.