If you want to say "There is no problem" in an Engpsh essay, you can use the following phrases:

"There are no issues to report."
"There are no concerns to address."
"Everything is running smoothly."
"All systems are go."

Here is an example of how you might use one of these phrases in an essay:

"After conducting a thorough analysis, we can confidently say that there are no issues to report. All systems are functioning as expected and everything is running smoothly. We will continue to monitor the situation closely to ensure that it remains this way."

Alternatively, you could simply say "There is no problem." This is a straightforward and clear way to convey that everything is going well.