Alex says that the secretary will send an email with the minutes, or written notes, for the meeting.
Alex asks people to read the minutes and let him know if they have any corrections or additions.
"Corrections" are changes that are needed to fix a problem, usually something that is in a written document.
"I have some corrections to your letter" - I have some changes, there are some things that are wrong that you need to fix.
An "addition" is something that is added to something else.
You might make an addition to the minutes by saying that "I said something that was not in the minutes, so I want to add it."
Alex wants people to make corrections to the minutes if they read anything that is wrong - that is incorrect, and additions if they think that something is missing.
Alex also says that the secretary will try to find a meeting space, or place to meet, for next Tuesday.
He says that the secretary will send everyone a reminder with that info a few days before the meeting.
A "reminder" (reminder) is something that helps you remember something else.
A reminder could be on your calendar, or it could be someone sending you an email saying, "I am reminding you (I am asking you to remember) our appointment," for example.