To detect and catch Pokémon, you need to work hard. After finding the pokemon you must click on the pokemon and catch it. Many players complain that they can not do this – hence, it becomes a problem for game developers.
Some errors cause the game server. Because of problems in the gameplay and the server is impossible to continue this way, you can not affect. But most of the problems appear on the user side, and you are quite capable to solve them yourself.
I can not click on the Pokemon in Pokemon Go
1) First of all, make sure that you are in close proximity and the radius of your radar covers appeared Pokémon.
2) You need to be sure that the Internet works well in this place. If the Internet is slow or unstable, it is possible that your actions in the game will get on with a delay of the server.
3) Ensure the stable operation of your GPS module. You can use the GPS Test program. If the GPS sensor is unstable, it is possible that you will not be able to click on the pokemon and catch it (this problem may occur periodically)
If you are sure that the problem is not your location or problems with the device, it is likely the case in the game servers. Everyone knows that they are often quite to crash from the huge number of online players.