What Causes “Error 26” on Pokemon Go and How to Fix it?

After a thorough investigation, we found the causes to be:

Solution 1: Deleting Pokemon

Since the issue is triggered by a large amount of lag between the server and the mobile, we will be deleting the pokemon that caused this lag and then catching it again from the stack. For that: Doing so will cause the mobile to think that you haven’t already caught the pokemon in question and it will decrease the lag which should bring the game back to normal.

Solution 2: Clearing Cache

In some cases, the launch configurations that have been cached by the mobile can prevent the game from being able to work properly. The data being cached by other applications in the cache partition can also cause this, check out the Wipe Cache Partition article to delete it altogether. In this step, we will be clearing the cache for Pokemon Go. For that:

Solution 3: Reinstalling Game

Sometimes, the game files might have been corrupted which can cause this problem, therefore, in this step, we will be reinstalling the game after uninstalling it from our mobile.

Solution 4: Changing Location

If you are located in a specific location where Pokemon Go might have been banned, it is recommended to move to another place or use a reliable VPN service to change your location because Pokemon Go is prohibited in certain countries and areas.

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