Rstudio plots-Cannot see labels

Hi All,
I am not able to see any labels on Rstudio plots. They look like this.
Thank you!!

Rplot_nolabels

Here is my sessionInfo

R version 3.6.1 (2019-07-05)
Platform: x86_64-conda_cos6-linux-gnu (64-bit)
Running under: Ubuntu 18.04.5 LTS

Matrix products: default
BLAS/LAPACK: /stor/home/grt293/miniconda3/lib/R/lib/libRblas.so

Random number generation:
RNG: Mersenne-Twister
Normal: Inversion
Sample: Rounding

locale:
[1] en_US.UTF-8

attached base packages:
[1] stats graphics grDevices utils datasets methods base

other attached packages:
[1] edgeR_3.28.0 limma_3.42.0 RColorBrewer_1.1-2 RSQLite_2.1.1

loaded via a namespace (and not attached):
[1] locfit_1.5-9.4 Rcpp_1.0.1 lattice_0.20-38 digest_0.6.18 grid_3.6.1
[6] DBI_1.1.0 rlang_0.4.7 blob_1.2.1 vctrs_0.3.4 tools_3.6.1
[11] bit64_0.9-7 bit_1.1-14 yaml_2.2.0 compiler_3.6.1 memoise_1.1.0

Hi, welcome!

We don't really have enough info to help you out. Could you ask this with a minimal REPRoducible EXample (reprex)? The code you used to produce this plot (including dummy or sample data and packages) would be very helpful.

If you've never heard of a reprex before, you might want to start by reading this FAQ:

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