I have an ESP-01S relay V1.O module. I have uploaded code. The problem is if the ESP-01 module is fitted in the wifi relay module and I put power on, the module does not go online and relay not clicks. If I remove the ESP-01 from the relay 8 pin adopter and insert it again, then the module comes online and relay clicks. I mean, after power on the relay module and fitting the ESP-01 works fine. What is the issue? I have connected VCC and EN pin with 10k resistor too.
The issue is that you have not given enough information for the forum to help you.
Please read the forum guide in the sticky post at the top of most forum categories.
Hi, @kamaraj-p
Welcome to the forum.
https://forum.arduino.cc/t/how-to-get-the-best-out-of-this-forum
What are you using for a power supply?
Can you please post a copy of your circuit, a picture of a hand drawn circuit in jpg, png?
Hand drawn and photographed is perfectly acceptable.
Please include ALL hardware, power supplies, component names and pin labels.
Tom.... 
Which code and how have you uploaded it ?
Addressing Your Issue:
You can spend weeks spinning your wheels, or you might get lucky and solve your problem quickly. To avoid unnecessary delays, it’s crucial to provide an annotated schematic of your circuit as you have it wired, showing all connections, including power, ground, and power supplies. I recommend it be in English, you can translate before posting if needed.
Why Detailed Information Matters:
Annotated Schematics: These are essential because they show exactly how your circuit is set up. Without them, it's difficult for anyone to understand what you’ve done, which makes troubleshooting nearly impossible. Fritzing diagrams or unclear pictures are not enough.
Technical Information: Many modules look similar and may even have the same name, but they can function differently. This is why we always ask for links to detailed technical information not just sales pages like those on Amazon, which often lack the specifics we need.
Post your Software Without that we do not have a clue as to how it is expected to operate. Be sure to use code tags.
Show All Connections: It’s important to include every connection, especially power, ground and power sources in your schematic. Missing these details makes it hard to determine if a setup issue might be causing your problem.
My Process:
When I see a question, I spend a moment assessing it. If it’s missing critical information, I might ask for it. However, if it's repeatedly lacking important details, I may assume the questioner is not serious and move on to another query.
What You Need to Consider:
We don’t know your skill level or what resources you have available. If you’re missing key technical details or seem unprepared, it may indicate that you need to spend more time learning the basics before starting your project.
Providing the right information upfront will help you get the best possible assistance and avoid the frustration of running into dead ends. Let us help you by sharing what you have clearly and completely!
Try reading this: How to get the best out of this forum