Good find.
Always nice to find silver coins, especially older ones.

It is only an error if it happens during the actual striking of the planchet.
Anything that happens after that is damage. What you have could not have
happened at that that time so by default it is damage. It is impossible to say
exactly where this happened.

1999 was copper plated zinc so that would make it a zinc bubble.

That hole is just minor damage.
Most small anomolies are just damage as opposed to an error.

Depends on what year it is.
You should always put the year in your heading.

Welcome to Coins and Canada
Please explain what you see as an error. All I see is a well circulated 1987 Loonie.
Also always show both sides of the coin when posting. You have 5 of the reverse
and none of the obverse.

That is known as a broken post. Not really an error, it is part of the minting process.
Quite common on D and P mintmarks and adds no value.
Nice photography and cropping, just what we need when evaluating coins.

It’s damage.
There is no way that could have happened when it was struck.
Maybe someone was trying to drill a hole in it.

Hard to tell whether it is a crack or a die chip but it doesn’t make much difference.

Hard to say from the photos supplied but it does not matter as the “No Chrome” variety
is no longer recognized by the graders as the chrome can be chemically removed making
it impossible to tell between a original and an altered nickel.

If you are asking for our help, then help us by posting a clear photo of both sides of the coin along with a closeup of your area of concern. Please be explicit in your question. ( Do not say something like “Is this an error” point out what you think is an error.) One coin per posting with date and ...

The mint does not release figures on different varieties.
The number minted would be included in the overall mintage of 2,650,000.

It does.
You have to click on where it says “Mint State” because there
is no extra value to these unless they are uncirculated.

To give a more accurate grade, we need to see a complete clear photo of both sides.
Can’t grade from a partial photo.

Always take a photo of the complete coin so we can get some perspective of the “error”.
Sometimes photos can be too large. Also include the date in your heading, sometimes this can be important.