I'm trying to import Text based subtitles into Adobe encore, but when I do I keep getting "No text found under line (number)" Or "Invalid line"

How do I fix it?

For reference the Text goes something like this:

5
00:01:48,680 --> 00:01:52,992
Our story begins
in a distant past, in Alexandria,

6
00:01:53,280 --> 00:01:55,714
or at Alexandria, both are possible...

7
00:01:55,920 --> 00:01:59,959
...in Egypt, at the palace
of the queen of queens.


I hope someone can help me, I've been trying to fix the problem for hours (with other threads)