forEach common errors

so this is the 3rd time I am writing this question, because the first time it timed out and the second I typed eventually the entire question but hit the tab key which apparently kills the entire question and forces you to start over.

so I am looking for common reasons why a forEach loop will not work,

I have already found a random bug where if you are missing target 1 from this expression

a!richTextIcon(
icon: "times",
color: "NEGATIVE",
size: "MEDIUM",
link:a!dynamicLink(saveInto: a!save(target1, remove(target2,fv!index))),
linkStyle: "STANDALONE"
)

a!richTextIcon(
icon: "plus",
color: "POSITIVE",
link:a!dynamicLink(
saveInto: {
a!save(target3, append(target3,'type!{urn:com:appian:types})
}

nothing works

or if you have a , here 

a!save(target3, append(target3,'type!{urn:com:appian:types}), 

after this line it does not load the first for each

btw this is now the 4th time writing this making sure to save my question very often.. any idea why it keeps forcing me to reload?

i found that it does not like the tab key or you to try to add tags in the newuser space

5th time btw